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tools/imgutil.py
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        for name in os.listdir(path):
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                if name in exclude_names:
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                        continue
 
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                item = ItemToPack(path, name)
 
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                if not (item.is_dir or item.is_file):
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                        continue
 
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                yield item
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def chunks(item, chunk_size):
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        inf = open(item.path, 'rb')
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        rd = 0
 
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        while (rd < item.size):
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                data = bytes(inf.read(chunk_size))
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                yield data
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                rd += len(data)
 
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        inf.close()